Machine for molding tubes or cylinders



(No Model.) s sheets-sheet 1.

H. G. KBASBEY.

MAGHINB PoR MOLDING TUBES 0R GYLINDBRS.

NO. 397,860. PatentedY Feb. 12, 1889.

ATTORNEYS.

(No Model.) 3 Sheets--Sheet 2.-

H. G. KEASBEY. y

MACHINE FOR MOLDING TUBES 0B, GYLINDBRS.

No. 397,860. Patented Peb. l2, 1889;

(No Model.) s sums-sheen s.

H. G. KEASBEY.

MACHINE PoR MOLDING TUBES 0R GYLINDL'RS.

10.397,86 Patente-aeb-1z1889@ 1 nu gr A .l NA Pneus Pmwmnognpner. wmsq nnnnnnn c,

UNITED STATES PATENT OFFICE.

HENRY G. KEASBEY, OF AMBLER, ASSIGNOR OF ONE-HALF TO RTCHARD V.

MATTISO, OF FHLADELPHIA, PENNSYLVANIA. Y

MACHINE FOR VIOLDING TUBES OR CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 397,860, dated February 12, 1889.

ppllcation tiled February 29, 1838. Serial No. 265,741. (No model.)

To all whom it may concern:

Be it known that l', HENRY G. KEAsBEY, a citizen of the United States, residing at Ambler, in the county of Montgomery, State of Pennsylvania, have invented a new and useful Improvement in Machines for Molding Tubes or Cylinders, which improvement is fully set forth in the following speeiiication and accompanying drawings.

My invention has for its object the production of an apparatus or machine for forming or molding tubes or cylinders of plastic material, such as arc employed for covering steam and like pipes, by which the tubes or cylinders I 5 are formed perfectly, rapidly, and cheaply.

To attain the desired objects the invention consists, first, in a peculiar construction of mold for forming the tube; second, in a press of suitable construction for containing the 2O mold; third, in an improved apparatus for feeding the material to the mold, and, finally, in the novel construction, arrangement, and adaptation of parts, all as hereinafter described and claimed.

Figure l represents a vertical sect ional view of a press and mold embodying my invention. Fig. 2 represents a side elevation thereof. Fig. represents a top or plan view thereof. Fig. l represents aview of the parts compris- 3o ing the mold and the end or head and tail pieces. Fig. is a top or plan view ot' the complete apparatus or machine.

Similar letters of reference indicate corresponding parts in the several figures.

Referring' to the drawings, A designates a hand-press of the well-known and usual or of any preferred construction in connection with which l employ my apparatus.

Resting on the bed-plate of the press is a 4o metal case or box, B, as clearly shown in Fig.

l. This ease has its inner walls inclined, or, in other words, is substantially hexagonal in cross-section.

C designates the bottom portion of the mold,

45 which may be constructed of wood, metal, or other suitable material, and may, if desired, for eonvenirsnce in constructing, be formed in two parts or sections hinged together, as shown in Fig. 4. This bottom portion of the mold 5o is hexagonal on its outer surface, to allow it to rest or [it snugly .in the case or box B, and cut out at c for the purpose to be explained. The inner face of the bottom portieri is curved or semicircular, and has grooves or channels c' extending longitiulinally over its surface, the purpose of which is to drain the liquid from the material which forms the pipes or tubes. v

D designates the top portion of the mold, which is carried by the follower of the press, and comprises the .flat portion d, the depending, curved, or semicircular ridge or portion e, and the inclined projections f. This portion may also be provided with the longitudinal grooves or channels before mentioned. Both the top and bottom. portion or core and body thereof are covered with muslin or like material. From this construction it will be observed that the top and bottom of the mold, when fitted together, provide a half or semicircular space, and in this space the material to form the pipes, tubes, or cylinders is placed.

E and E designate, respectively, the head and tail pieces. To the head-piece E is secured a plate, F, provided with. a socket, G, to receive one end of a screw, ll. This screw also passes through a bar, I, and at. its outer end has a lever, wheel, or eranlgN. The said bar J has secured or connected to its ends rods or arms K, which rods or arms are hinged, jointed, or pivoted at 7T'. to long arms L. From this construction it is evident that'the headpiece can be pressed firmly into contact with the mold by means of the screw, or be swung out of the way to permit the mold to be withdrawn from the press. The ends of the arms or rods L are connected to a plate, E, secured to the tail-piece E. Passing through the tail-piece E', and havin its open end adjacent to the mold, is a feed or supply pipe, M. This supply or feed pipe, provided with a cock or check, m, leads from a reservoir, N, and has a feed-pump, O, and air-chamber P, provided with a pressuregage situated at a proper point. of its length, alias clearly shown in Fig. 5 of the drawings.

This being the construction of the apparatus, the consequent operation is as follows: The mold is placed in the press, and the IOO head and tail pieces tightly close the ends of the mold, andthe projections iit snugly in the recess formed between the cut-out portion of the lower section oi the mold and the surrounding case or box lf. rlhe cock on the feed-pi pe is opened and the material for forming the mold is forced from the reservoir by means of the pump through the feed-pipe to the mold, and when the proper amount is supplied to the mold the cock is closed. The lquid is drained from the material and themold is removed and emptied. The air-chamber, which contains air under pressure, acts as a cushion to prevent shock and pressure on the mold.

It is evident that a number ol' the presses containing the mold can be fed from a common or single reservoir, or that more than one mold can be placed .in a press.

I have shown and described my invention Vfor making half cylinders or tubes; but I would have it understood that the same is applicable tothe construction of an entire tube.

It will bc observed that an apparatus constructed as described will produce or make tubes, pipes, or cylinders oi the character described cheaply, rapidly, and perfectly.

Having thus described my invention, what I claim as new, and desire to secure by 'Letters Patent, is-

l. A machine orapparaius l'or making plastic tubes, havingI a press with a mold therein, a reservoir, a sulmlypipe leading from said reservoir i o said mold, a pumping device for forcing tube matt-@rial from the said reservoir to said mold, and an air-chamber communi eating Wi th said suppl y-pipe and between the pumping device and the mold, said parts bcing combined substantially as described.

:2. A press with a mold therein, a tail-piece with arms secured thereto, bars pivoted to said arms, a cross-bar secured to said bars, a headpiece with a plate having a socket, and a screw passing through the cross-bar and Working in said socket, said parts being combined substantially as described.

3. In a machine for making plastic tubes, the combination, with the press having the mold arranged in a case therein, of the head and tail pieces closing the ends of the mold, the head-piece being capable of a swinging movement, substantially as and for the purpose described.

4. In an apparatus for making plastic tubes, a mold consisting of an upper or top portion having the iiat part d, the depending curved ridge e, and the inclined projection f, and a bottom portion with a curved inner face and cut-out portion c, said parts combined substantially as and for the purpose set forth.

5. In a machine for making plastic tubes, pipes, or cylinders, the press containing the mold, and the head and tail pieces connected together for closing the ends of the mold, in combination with the Vfeed-pipe provided with a cock or check for supplying material to the mold, substantially as described.

(5. In a machine or apparatus for making plastic tubes, the combination, with the press containing the mold, of the head and tail pieces connected together and closing the ends of the mold, devices in the head-piece for pressingthe head and tail pieces firmly against the ends of the molds, and an opening in the tailpiece to receive the feed or supply pipe, substantially as and for the purpose described.

7 In a machine for making plastic tubes, the mold comprising the upper and lower part', said lower part being hinged and both provided with longitudinal grooves or channels, substantially as described.

HENRY G. KEASBEY.

lVitnesses:

WM. N. Moons, A. P. JENNINGS. 

